CN108254682A - The method of discrimination of direct-current charging post output contactor adhesion fault - Google Patents
The method of discrimination of direct-current charging post output contactor adhesion fault Download PDFInfo
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- CN108254682A CN108254682A CN201711466826.7A CN201711466826A CN108254682A CN 108254682 A CN108254682 A CN 108254682A CN 201711466826 A CN201711466826 A CN 201711466826A CN 108254682 A CN108254682 A CN 108254682A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of method of discrimination of direct-current charging post output contactor adhesion fault, there are three types of state, before charging, in charging, after charging.Method of discrimination provides different processing steps respectively for three kinds of states.Include the following steps before charging：Charging pile starts charging, and direct current output contactor disconnects, and differentiates batteries of electric automobile loop voltage size；Starting up's charging module if battery is without pressure, charging module voltage rise to given voltage；Differentiate cell voltage size, if cell voltage is equal with module voltage, output contactor combined floodgate adhesion；Output contactor state is normal if battery is without pressure, carries out next step detection；Output contactor is closed, cell voltage size is differentiated again, if battery is without pressure, output contactor separating brake adhesion；If cell voltage is equal with module voltage, output contactor state is normal, carries out next step Insulation monitoring and charging.The present invention for before charging, charge in differentiate the adhesion fault state of output contactor with providing the detection method of complete set after charging.
Description
Technical field
The present invention relates to electric vehicle charging field, more particularly to a kind of direct-current charging post output contactor adhesion fault event
Barrier sentences method for distinguishing.
Background technology
The direct current output contactor of charging pile is due to material and life problems, and there are the adhesions of contactor combined floodgate and separating brake adhesion
Risk, when contactor is in combined floodgate adhesion, output contactor is constantly in closed state, the charging gun headband of charging pile
Electricity, there are personal safety danger in engineer application；When contactor is in separating brake adhesion, output contactor is constantly in disconnection
State, charging pile can not charge to electric vehicle, cause the wasting of resources.
In order to solve problem above, the output contactor with feedback node is largely used in industry, which is such
Whether type contactor can feed back the current opening and closing state of contactor abnormal so as to determine contactor, but on condition that feedback node
Signal it is correct, if during feedback signal failure still exist erroneous judgement risk.Simultaneously in the case where type selecting parameter is identical, band is anti-
The output contactor ratio for presenting node is much higher without feedback node output contactor cost, and contactor supplier is also lacked very
More, how to be used without feedback node output contactor correctly reliably can judge that the adhesion fault of contactor perplexs always again
The development of industry.
Invention content
The purpose of the present invention is to provide a kind of direct-current charging posts that correctly can reliably judge contactor adhesion fault
The method of discrimination of output contactor adhesion fault.
The purpose of the present invention can be achieved, and design a kind of differentiation side of direct-current charging post output contactor adhesion fault
Method before charging, includes the following steps：
A1, direct-current charging post direct current output contactor use without feedback node type；
A2, DC charging rifle are inserted into electric car charging interface, and physical connection is intact；
A3, start to start charging, charging pile direct current output contactor disconnects, and charging pile is shaken hands with battery management system foundation
Communication；
A4, charging pile detection cell voltage U1, if U1 without pressure, is carried out in next step, otherwise charging pile stops charging, and
Alarm prompt is sent in man-machine interface；
A5, charging pile control charging module booting, output voltage U；
The size of A6, comparative cell voltage U1 and module voltage U, if cell voltage U1 and module voltage U are equal in magnitude,
Illustrate that contactor both sides voltage is equal, contactor is practically in "on" position, illustrates contactor combined floodgate adhesion exception, then charging pile
Stop charging, and contactor combined floodgate adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 and module voltage U is differed,
Then prove that contactor both sides voltage is unequal, it is normal that contactor is practically in gate-dividing state, then carries out in next step；
A7, output contactor is closed, is carried out after t1 in next step；
The size of A8, comparative cell voltage U1 and module voltage U, if cell voltage U1 differs in size with module voltage U,
Illustrate that contactor both sides voltage is unequal, contactor is practically in gate-dividing state, illustrates contactor separating brake adhesion exception, then charges
Stake stops charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 and module voltage U phases
Deng then proving that contactor both sides voltage is equal, it is normal that contactor is practically in "on" position, then carries out in next step；
A9, insulating monitoring is carried out, Insulation monitoring is complete to be started to charge up.
Further, t1 is 1s~2s, carries out voltage acquisition stabilization or so.
Further, charging pile is equipped with the sampling circuit of detection cell voltage.
Further, charging pile is equipped with man-machine interface display device.
Further, the module voltage U of charging module takes power transmission pond highest on battery management system to allow the total voltage that charges
With both charging pile rated voltages smaller value.
The purpose of the present invention designs a kind of differentiation of direct-current charging post output contactor adhesion fault it is also possible that realization
Method includes the following steps in charging process：
Charging pile direct current output contactor closes a floodgate in 2A, charging process, and battery major loop is closed, and charging pile carries out battery
Charging；
2B, charging pile output current need electric current to be adjusted according to electric vehicle；
If 2C, charging no current illustrate that output contactor is in gate-dividing state, the adhesion of contactor separating brake is abnormal, then fills
Electric stake stops charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；Otherwise continue to charge.
Further, the demand charging current of electric vehicle should be greater than zero.
Further, charging pile is equipped with charging current acquisition circuit.
The purpose of the present invention designs a kind of differentiation of direct-current charging post output contactor adhesion fault it is also possible that realization
Method includes the following steps after charging complete：
Charging module shuts down after 3A, charging complete, disconnects output contactor；
3B, electric vehicle disconnect battery major loop；
3C, charging module are because its output terminal has bus capacitor, and electricity will not momentary loss presence under off-mode
Certain residual voltage, if cell voltage is more than zero, output contactor is in closed state, illustrates contactor combined floodgate adhesion exception,
Contactor combined floodgate adhesion alarm prompt is then sent in man-machine interface.
The present invention charge for direct-current charging post before, sentence with providing the detection method of complete set after charging in charging
The adhesion fault state of other output contactor can be used the output contactor without feedback contact, substantially reduce hardware cost,
There is no the risks of feedback signal failure simultaneously, solve a pain spot of industry.
Description of the drawings
Fig. 1 is the charging schematic diagram of present pre-ferred embodiments；
Fig. 2 is the schematic diagram of the voltage and current measurement value of present pre-ferred embodiments；
Fig. 3, which is that the charging of present pre-ferred embodiments is preceding, differentiates flow chart；
Fig. 4 is to differentiate flow chart in the charging of present pre-ferred embodiments；
Fig. 5 is to differentiate flow chart after the charging of present pre-ferred embodiments.
Specific embodiment
The invention will be further described with reference to embodiments.
A kind of method of discrimination of direct-current charging post output contactor adhesion fault, there are three types of situations, before charging, charge
In, charging after.
As shown in figure 3, a kind of method of discrimination of direct-current charging post output contactor adhesion fault, before charging, including with
Lower step：
A1, as shown in Figure 1, the direct current output contactor of direct-current charging post is used without feedback node type, save cost.
A2, DC charging rifle are inserted into electric car charging interface, and physical connection is intact；Electric vehicle about needs to meet with charging pile
5 national standards in 2015 of charging interface and communication protocol.
A3, start to start charging, charging pile direct current output contactor disconnects, and charging pile is established with battery management system BMS
Handshake communication.In the present embodiment, charging pile direct current output contactor disconnects K1K2, and charging pile is shaken hands with BMS by the foundation of Can lines
Communication.
A4, charging pile detection cell voltage U1, if U1 without pressure, is carried out in next step, otherwise charging pile stops charging, and
Alarm prompt is sent in man-machine interface；Charging pile is equipped with the sampling circuit of detection cell voltage；Charging pile is shown equipped with man-machine interface
Device.In the present embodiment, if U1 is less than 10V, K5K6 is separated, then carries out in next step, and otherwise charging pile stops charging, and
Alarm prompt is sent in man-machine interface.
A5, charging pile control charging module booting, output voltage U.
The size of A6, comparative cell voltage U1 and module voltage U, if cell voltage U1 and module voltage U are equal in magnitude,
Illustrate that contactor both sides voltage is equal, contactor is practically in "on" position, illustrates contactor combined floodgate adhesion exception, then charging pile
Stop charging, and contactor combined floodgate adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 and module voltage U is differed,
Then prove that contactor both sides voltage is unequal, it is normal that contactor is practically in gate-dividing state, then carries out in next step；Charging module
Module voltage U takes power transmission pond highest on battery management system to allow both total voltage and charging pile the rated voltage smaller value that charges.
Cell voltage and module voltage deviation need to consider voltage sample error.
In the present embodiment, if | U1-U |<5V then proves that contactor both sides voltage is equal, and contactor is practically in combined floodgate shape
State illustrates contactor combined floodgate adhesion exception, then charging pile stops charging, and the adhesion of contactor combined floodgate is sent to alert in man-machine interface
Prompting；If | U1-U |>5V then proves that contactor both sides voltage is unequal, contactor K1K2 separating brakes, then carries out in next step.
A7, output contactor is closed, is carried out after t1 in next step；Need grade contactors that could enter after being closed completely next
Step.T1 is 1s~2s, carries out voltage acquisition stabilization or so.In the present embodiment, output contactor K1K2 is closed, 1 second with laggard
Row is in next step.
The size of A8, comparative cell voltage U1 and module voltage U, if cell voltage U1 differs in size with module voltage U,
Illustrate that contactor both sides voltage is unequal, contactor is practically in gate-dividing state, illustrates contactor separating brake adhesion exception, then charges
Stake stops charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 and module voltage U phases
Deng then proving that contactor both sides voltage is equal, it is normal that contactor is practically in "on" position, then carries out in next step.The present embodiment
In, if | U1-U |>5V then proves that contactor both sides voltage is unequal, and contactor K1K2 is practically in gate-dividing state, illustrates to contact
The adhesion of device separating brake is abnormal, then charging pile stops charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；Otherwise it connects
It is normal that tentaculum is practically in "on" position, then carries out in next step.
A9, insulating monitoring is carried out, Insulation monitoring is complete to be started to charge up.
As shown in figure 4, a kind of method of discrimination of direct-current charging post output contactor adhesion fault, charging process include with
Lower step：
Charging pile direct current output contactor closes a floodgate in 2A, charging process, and battery major loop is closed, and charging pile carries out battery
Charging.In the present embodiment, charging pile K1K2 closes a floodgate in charging process, and battery major loop K5K6 closes a floodgate, and charging pile carries out battery
Charging.
2B, charging pile output current need electric current to be adjusted according to electric vehicle；
If 2C, charging no current illustrate that output contactor is in gate-dividing state, the adhesion of contactor separating brake is abnormal, then fills
Electric stake stops charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；Otherwise continue to charge.
The demand charging current of electric vehicle should be greater than zero.In the present embodiment, charging current I is set<1A then illustrates to export
Contactor is in gate-dividing state, illustrates contactor separating brake adhesion exception, then charging pile stops charging, and send and connect in man-machine interface
Tentaculum separating brake adhesion alarm prompt；Otherwise continue to charge.
Charging pile is equipped with charging current acquisition circuit.
Include as shown in figure 5, a kind of method of discrimination of direct-current charging post output contactor adhesion fault, after charging complete with
Lower step：
Charging module shuts down after 3A, charging complete, disconnects output contactor K1, K2.
3B, electric vehicle disconnect battery major loop K5, K6.
3C, charging module are because its output terminal has bus capacitor, and electricity will not momentary loss presence under off-mode
Certain residual voltage, if cell voltage is more than zero, output contactor is in closed state, illustrates contactor combined floodgate adhesion exception,
Contactor combined floodgate adhesion alarm prompt is then sent in man-machine interface.
In the present embodiment, if cell voltage U1>10V illustrates contactor combined floodgate adhesion exception, then contact is sent in man-machine interface
Device combined floodgate adhesion alarm prompt.
If Fig. 2 is the voltage and current measurement value schematic diagram in charging process, glued in the insulation stage when contactor is in close a floodgate
Cell voltage is equal with charging module voltage when even, and when the insulation stage is when separating brake adhesion, corresponding battery voltage measurement is
Zero, when separating brake adhesion in charging process, current measurement value is zero.
For the relatively reliable adhesion state that can judge output contactor, largely used with the defeated of feedback node in industry
Go out contactor, under equal voltage class, band feedback node output contactor ratio is of high cost without feedback node output contactor
Very much, while with feedback node output contactor there is also the risks of feedback signal failure.The present invention charges in direct-current charging post
Before, in charging differentiate the adhesion fault state of output contactor with providing the detection method of complete set after charging, can make
With the output contactor without feedback contact, hardware cost is substantially reduced, while there is no the risk of feedback signal failure, solutions
One pain spot of industry of having determined.
For can all implement the present invention in the control system arbitrarily containing D.C. contactor, it is not necessary to modify any hardware by the present invention
And interface, charging pile or other relevant industries can be directly applied to.
It should be noted that this above implementation is merely preferred embodiments of the present invention, the method is not used to
Limited to this, although having been carried out specifically to the differentiation of direct-current charging post output contactor adhesion fault with reference to the foregoing embodiments
It is bright, for those skilled in the art, can still modify to the technical solution recorded in aforementioned implementation or
Equivalent replacement is carried out to which part technical characteristic.All within the spirits and principles of the present invention, it is any modification for being made, equivalent
Replace, improve etc., it should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of method of discrimination of direct-current charging post output contactor adhesion fault, which is characterized in that before charging, including following
Step：
A1, direct-current charging post direct current output contactor use without feedback node type；
A2, DC charging rifle are inserted into electric car charging interface, and physical connection is intact；
A3, start to start charging, charging pile direct current output contactor disconnects, and charging pile is shaken hands logical with battery management system foundation
Letter；
A4, charging pile detection cell voltage U1, if U1 is carried out in next step, otherwise charging pile stops charging, and man-machine without pressure
Alarm prompt is sent on interface；
A5, charging pile control charging module booting, output voltage U；
The size of A6, comparative cell voltage U1 and module voltage U, if cell voltage U1 and module voltage U are equal in magnitude, illustrate
Contactor both sides voltage is equal, and contactor is practically in "on" position, illustrates contactor combined floodgate adhesion exception, then charging pile stops
Charging, and contactor combined floodgate adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 and module voltage U is differed, demonstrate,prove
Bright contactor both sides voltage is unequal, and it is normal that contactor is practically in gate-dividing state, then carries out in next step；
A7, output contactor is closed, is carried out after t1 in next step；
The size of A8, comparative cell voltage U1 and module voltage U, if cell voltage U1 differs in size with module voltage U, illustrate
Contactor both sides voltage is unequal, and contactor is practically in gate-dividing state, illustrates contactor separating brake adhesion exception, then charging pile stops
It only charges, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；If cell voltage U1 is equal with module voltage U,
Prove that contactor both sides voltage is equal, it is normal that contactor is practically in "on" position, then carries out in next step；
A9, insulating monitoring is carried out, Insulation monitoring is complete to be started to charge up.
2. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 1, it is characterised in that：t1
For 1s~2s, voltage acquisition stabilization or so is carried out.
3. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 1, it is characterised in that：It fills
Electric stake is equipped with the sampling circuit of detection cell voltage.
4. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 1, it is characterised in that：It fills
Electric stake is equipped with man-machine interface display device.
5. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 1, it is characterised in that：It fills
The module voltage U of electric module takes power transmission pond highest on battery management system to allow charge both total voltage and charging pile rated voltage
Smaller value.
6. a kind of method of discrimination of direct-current charging post output contactor adhesion fault, which is characterized in that charging process include with
Lower step：
Charging pile direct current output contactor closes a floodgate in 2A, charging process, and battery major loop is closed, and charging pile fills battery
Electricity；
2B, charging pile output current need electric current to be adjusted according to electric vehicle；
If 2C, charging no current illustrate that output contactor is in gate-dividing state, the adhesion of contactor separating brake is abnormal, then charging pile
Stop charging, and contactor separating brake adhesion alarm prompt is sent in man-machine interface；Otherwise continue to charge.
7. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 5, it is characterised in that：Electricity
The demand charging current of electrical automobile should be greater than zero.
8. the method for discrimination of direct-current charging post output contactor adhesion fault according to claim 5, it is characterised in that：It fills
Electric stake is equipped with charging current acquisition circuit.
9. a kind of method of discrimination of direct-current charging post output contactor adhesion fault, which is characterized in that after charging complete include with
Lower step：
Charging module shuts down after 3A, charging complete, disconnects output contactor；
3B, electric vehicle disconnect battery major loop；
3C, charging module because its output terminal has bus capacitor, under off-mode electricity will not momentary loss exist it is certain
Residual voltage, if cell voltage is more than zero, output contactor be in closed state, illustrates that the adhesion of contactor combined floodgate is abnormal, then people
Contactor combined floodgate adhesion alarm prompt is sent on machine interface.
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| CN109596940A (en) * | 2018-12-29 | 2019-04-09 | 蜂巢能源科技有限公司 | The detection device of power battery charging contacts of contactor adhesion, vehicle |
| CN110435471A (en) * | 2019-07-22 | 2019-11-12 | 宁波三星智能电气有限公司 | Power output control system, charge control system and the power output control method of charging pile |
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| CN111679183A (en) * | 2020-07-01 | 2020-09-18 | 中国第一汽车股份有限公司 | Relay adhesion detection circuit and method, vehicle and storage medium |
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| CN110435471A (en) * | 2019-07-22 | 2019-11-12 | 宁波三星智能电气有限公司 | Power output control system, charge control system and the power output control method of charging pile |
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| CN110456265A (en) * | 2019-08-16 | 2019-11-15 | 武汉合康智能电气有限公司 | The detection method of relay in a kind of charging pile |
| CN113589194A (en) * | 2020-04-30 | 2021-11-02 | 上海钛昕电气科技有限公司 | Adhesion detection and short circuit detection circuit and control method thereof |
| CN113589194B (en) * | 2020-04-30 | 2024-05-28 | 上海钛昕电气科技有限公司 | Adhesion detection and short circuit detection circuit and control method thereof |
| CN111679183A (en) * | 2020-07-01 | 2020-09-18 | 中国第一汽车股份有限公司 | Relay adhesion detection circuit and method, vehicle and storage medium |
| CN111679183B (en) * | 2020-07-01 | 2022-08-16 | 中国第一汽车股份有限公司 | Relay adhesion detection circuit and method, vehicle and storage medium |
| CN112798947A (en) * | 2020-12-29 | 2021-05-14 | 东风汽车有限公司 | Detection circuit and detection method for electric vehicle quick charge relay and detection electronic equipment |
| CN112798946A (en) * | 2020-12-29 | 2021-05-14 | 东风汽车有限公司 | Detection method of electric vehicle quick charge relay detection circuit and detection electronic equipment |
| CN112816817A (en) * | 2021-01-04 | 2021-05-18 | 阳光电源股份有限公司 | Switching unit state detection method and application device |
| CN112816817B (en) * | 2021-01-04 | 2023-12-19 | 阳光电源股份有限公司 | Switching unit state detection method and application device |
| CN113391199A (en) * | 2021-05-31 | 2021-09-14 | 宁波三星智能电气有限公司 | Method for detecting adhesion of main contact of direct-current charging pile high-voltage relay |
| CN113212215A (en) * | 2021-06-23 | 2021-08-06 | 阳光电源股份有限公司 | Direct-current charging pile, charging control method and charging station |
| CN114069767A (en) * | 2021-10-13 | 2022-02-18 | 科华数据股份有限公司 | Charger switching protection device for battery module |
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Application publication date: 20180706 |